Effect of Heating Rate in Pyrolysis Process

The rate of heating of the biomass particle has an important influence on yield and composition of the product. Rapid heating to a moderate temperature (400-600 oC) yields higher volatiles and hence more liquid, while slower heating to that temperature produces more char. The operating parameters of a pyrolyzer are adjusted to meet the requirement of the final product of interest. Tentative design norms for heating in a pyrolyzer include the following :

-To maximize char production, use a slow heating rate (<0.01-2.0 oC/s), a low final temperature, and a long gas residence time.
-To maximize liquid yield, use a high heating rate, a moderate final temperature (450-600 oC), and a short gas resiedence time.
-To maximize gas production, use a slow heating rate, a high final temperature (700-900 oC), and a long gas residence time.

Production of charcoal through carbonization uses the first norm, more detail about our pyrolyzer please click here or if you want more considerations about charcoal production please click here.